76 lines
2.9 KiB
Python
76 lines
2.9 KiB
Python
"""
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Signal handling functions for use with external commerce service.
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"""
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import logging
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from crum import get_current_request
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from django.contrib.auth.models import AnonymousUser
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from django.dispatch import receiver
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from common.djangoapps.student.signals import REFUND_ORDER
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from openedx.core.djangoapps.commerce.utils import is_commerce_service_configured
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from .utils import refund_seat
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log = logging.getLogger(__name__)
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# pylint: disable=unused-argument
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@receiver(REFUND_ORDER)
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def handle_refund_order(sender, course_enrollment=None, **kwargs):
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"""
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Signal receiver for un-enrollments, used to automatically initiate refunds
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when applicable.
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"""
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if not is_commerce_service_configured():
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log.info("Commerce service not configured, skipping refund")
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return
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if course_enrollment and course_enrollment.refundable():
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log.info("Handling refund for course enrollment %s", course_enrollment.course_id)
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try:
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request_user = get_request_user() or course_enrollment.user
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if isinstance(request_user, AnonymousUser):
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# Assume the request was initiated via server-to-server
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# API call (presumably Otto). In this case we cannot
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# construct a client to call Otto back anyway, because
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# the client does not work anonymously, and furthermore,
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# there's certainly no need to inform Otto about this request.
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log.info(
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"Anonymous user attempting to initiate refund for course [%s]",
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course_enrollment.course_id,
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)
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return
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log.info("Initiating refund_seat for user [%s] for course enrollment %s",
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course_enrollment.user.id, course_enrollment.course_id)
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refund_seat(course_enrollment, change_mode=True)
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except Exception: # pylint: disable=broad-except
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# don't assume the signal was fired with `send_robust`.
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# avoid blowing up other signal handlers by gracefully
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# trapping the Exception and logging an error.
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log.exception(
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"Unexpected exception while attempting to initiate refund for user [%s], course [%s]",
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course_enrollment.user.id,
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course_enrollment.course_id,
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)
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elif course_enrollment:
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log.info(
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"Not refunding seat for course enrollment %s, as its not refundable",
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course_enrollment.course_id
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)
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else:
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log.info("Not refunding seat for course due to missing course enrollment")
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def get_request_user():
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"""
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Helper to get the authenticated user from the current HTTP request (if
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applicable).
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If the requester of an unenrollment is not the same person as the student
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being unenrolled, we authenticate to the commerce service as the requester.
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"""
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request = get_current_request()
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return getattr(request, 'user', None)
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